US9791824B2 - Image forming apparatus - Google Patents

Image forming apparatus Download PDF

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Publication number
US9791824B2
US9791824B2 US15/177,647 US201615177647A US9791824B2 US 9791824 B2 US9791824 B2 US 9791824B2 US 201615177647 A US201615177647 A US 201615177647A US 9791824 B2 US9791824 B2 US 9791824B2
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Prior art keywords
image forming
rail
unit
cassette
pair
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US15/177,647
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US20160363906A1 (en
Inventor
Kiyonori Yamamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Document Solutions Inc
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Kyocera Document Solutions Inc
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Publication date
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Assigned to KYOCERA DOCUMENT SOLUTIONS INC. reassignment KYOCERA DOCUMENT SOLUTIONS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: YAMAMOTO, KIYONORI
Publication of US20160363906A1 publication Critical patent/US20160363906A1/en
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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/1661—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements means for handling parts of the apparatus in the apparatus
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6502—Supplying of sheet copy material; Cassettes therefor
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/1604—Arrangement or disposition of the entire apparatus
    • G03G21/1623—Means to access the interior of the apparatus
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/1661—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements means for handling parts of the apparatus in the apparatus
    • G03G21/1695—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements means for handling parts of the apparatus in the apparatus for paper transport
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1678—Frame structures
    • G03G2221/1684—Frame structures using extractable subframes, e.g. on rails or hinges

Definitions

  • the present disclosure relates to an image forming apparatus which includes a slide-type image forming unit.
  • An image forming apparatus such as a printer, a copying machine and a multifunctional peripheral, is sometimes provided with an attachable/detachable unit, such as an image forming unit and a sheet feeding cassette.
  • an attachable/detachable unit is configured to slide with respect to an apparatus main body and to be held in a drawn state from the apparatus main body to some extent.
  • An image forming apparatus provided with such a slide-type attachable/detachable unit generally employs a configuration where the unit to be attached and detached is provided with a fixed rail and an extended rail which engages with the fixed rail and the apparatus main body is provided with a rail guide which guides the extended rail.
  • the image forming apparatus employing such a configuration needs a space for providing the rail guide in the apparatus main body, and therefore there is a problem that the apparatus main body becomes larger and the number of members and the number of working processes increase.
  • an image forming apparatus includes a housing and a pair of cassette guides.
  • the housing is provided with a cassette storage space and a unit storage space.
  • the cassette storage space is configured to store a sheet feeing cassette.
  • the unit storage space is disposed above the cassette storage space and configured to slidably support an image forming unit.
  • the housing has a pair of side plates arranged to be opposite to each other in a direction intersecting a sliding direction of the image forming unit.
  • the pair of cassette guides is provided in the cassette storage space and arranged inside the pair of side plate.
  • the guide rail part is formed by a gap between each of the pair of side plates and each of the pair of guide cassettes arranged inside the pair of side plates, and a top face of each of the pair of cassette guides.
  • a unit-side rail is provided to the image forming unit is slidably engaged with the guide rail part.
  • FIG. 1 is a perspective view showing an external appearance of a color printer according to one embodiment of the present disclosure
  • FIG. 2 is a perspective view showing an apparatus main body of the color printer according to one embodiment of the present disclosure
  • FIG. 3 is a perspective view showing a guide rail part of the color printer according to one embodiment of the present disclosure
  • FIG. 4 is a front view showing the guide rail part of the color printer according to one embodiment of the present disclosure.
  • FIG. 5 is a view schematically showing an internal structure of the color printer according to one embodiment of the present disclosure.
  • FIG. 6 is a perspective view showing an image forming unit of the color printer according to one embodiment of the present disclosure.
  • FIG. 7 is a view showing a unit-side rail of the image forming unit viewed from a rear side, in the color printer according to one embodiment of the present disclosure
  • FIG. 8 is a perspective view showing a rail piece of the unit-side rail, in the color printer according to one embodiment of the present disclosure
  • FIG. 9 is a perspective view showing a movable rail of the unit-side rail viewed from an above side, in the color printer according to one embodiment of the present disclosure.
  • FIG. 10 is a perspective view showing the movable rail of the unit-side rail viewed from a right side, in the color printer according to one embodiment of the present disclosure
  • FIG. 11 is a perspective view showing an engagement state of the rail piece with the movable rail before the rail piece is drawn with respect to the movable rail, in the color printer according to one embodiment of the present disclosure
  • FIG. 12 is a perspective view showing the engagement state of the rail piece with the movable rail when the rail piece is drawn with respect to the movable rail, in the color printer according to one embodiment of the present disclosure
  • FIG. 13A is a plan view schematically showing a positional relationship between the rail piece and the movable rail in a state where the image forming unit is stored, in the color printer according to one embodiment of the present disclosure
  • FIG. 13B is a plan view schematically showing the positional relationship between the rail piece and the movable rail in a state where the image forming unit is drawn halfway, in the color printer according to one embodiment of the present disclosure
  • FIG. 13C is a plan view schematically showing the positional relationship between the rail piece and the movable rail in a state where the imaging unit is drawn out into a first drawing step, in the color printer according to one embodiment of the present disclosure
  • FIG. 14 is a front view showing the unit-side rail with which the guide rail part is engaged, in the color printer according to one embodiment of the present disclosure
  • FIG. 15A is a side view showing the image forming unit at a storage state, in the color printer according to one embodiment of the present disclosure
  • FIG. 15B is a side view showing the image forming unit at the first drawing step, in the color printer according to one embodiment of the present disclosure
  • FIG. 15C is a side view showing the image forming unit at a second drawing step, in the color printer according to one embodiment of the present disclosure.
  • FIG. 16 is a perspective view showing the image forming unit drawn into the second drawing step, in the color printer according to one embodiment of the present disclosure.
  • FIG. 1 is a perspective view showing an external appearance of the color printer
  • FIG. 2 is a perspective view showing an apparatus main body
  • FIG. 3 is a perspective view showing a guide rail part of the apparatus main body
  • FIG. 4 is a front view showing the guide rail part
  • FIG. 5 is a view schematically showing an internal structure of the color printer
  • FIG. 6 is a perspective view showing an image forming unit.
  • front and rear directions and left and right directions are based on front and rear directions and left and right directions indicated in FIG. 1 .
  • the color printer 1 has a rectangular parallelepiped shaped apparatus main body 2 as shown in FIG. 1 .
  • the apparatus main body 2 has a housing 3 which forms a frame of the color printer 1 and an exterior cover 4 which covers an outside of the housing 3 .
  • the housing 3 is formed by a bottom plate 3 a , a top plate 3 b , a left side plate 3 c , a right side plate 3 d and a rear plate 3 e as shown in FIG. 2 .
  • the left side plate 3 c and the right side plate 3 d are opposite to each other in the left and right directions.
  • a front face of the housing 3 is opened.
  • On an upper face of the exterior cover 4 which covers the outside of the top plate 3 b an ejected sheet tray 6 on which a sheet is ejected is formed.
  • a stay 8 is bridged between the left side plate 3 c and the right side plate 3 d near a center in the vertical direction.
  • the inside of the housing 3 is divided into a unit storage space 10 above the stay 8 and a cassette storage space 11 under the stay 8 .
  • the left side plate 3 c and the right side plate 3 d are formed with holding pieces 13 protruding inward along the front and rear directions.
  • the holding piece 13 of the right side plate 3 d is formed by forming a protruding piece along a lower edge of an opening and then bending the protruding piece inward.
  • the cassette storage space 11 is provided with a pair of left and right cassette guides 15 , as shown in FIG. 2 .
  • the pair of left and right cassette guides 15 each having a vertically long rectangular parallelepiped shape are arranged along the inside faces of the left side plate 3 c and the right side plate 3 d of the housing 3 , respectively.
  • the cassette guide 15 is made of a resin material.
  • an upper face 15 a of the cassette guide 15 is formed into a flat plane.
  • a plurality of protruded parts 16 each having a flat upper plane are formed at a predetermined intervals in the front and rear directions. As shown in FIG.
  • the left and right side plates 3 c and 3 d are configured such that a gap 17 of a predetermined width is formed between each left and right side plates 3 c and 3 d and an upper portion of the cassette guide 15 arranged inward of each left and right side plates 3 c and 3 d .
  • the gap 17 and the upper face 15 a of the cassette guide 15 forms a guide rail part 18 .
  • a groove 21 is formed along the front and rear directions. With the grooves 21 , rails formed in a sheet feeding cassette 23 (refer to FIG. 5 ) are engaged so that the sheet feeding cassette 23 is slidably supported to the cassette storage space 11 .
  • a sheet feeding device 24 configured to feed the sheet stored in the sheet feeding cassette 23 is provided.
  • an exposure device 25 containing a laser scanning unit (LSU) is provided in an upper space of the cassette storage space 11 .
  • an image forming unit 27 is attachably and detachably supported. As shown in FIG. 6 , the image forming unit 27 has a bottom plate 28 , a front plate 29 and left and right supporting plates 30 which are opposite to each other in the left and right directions.
  • the image forming unit 27 is provided with an intermediate transferring belt 31 , a belt cleaning device 32 and four image forming parts 33 .
  • the intermediate transferring belt 31 is supported between the left and right supporting plates 30 so as to be rotated along the front and rear directions around a driving roller 34 and a driven roller 35 which are arranged at predetermined intervals in the front and rear directions.
  • the belt cleaning device 32 is arranged facing the driving roller 34 through the intermediate transferring belt 31 .
  • Four image forming parts 33 are arranged under the intermediate transferring belt 31 along the front and rear directions.
  • Each of the image forming parts 33 is provided with a photosensitive drum 36 supported rotatably.
  • a charger 37 Around the photosensitive drum 36 , a charger 37 , a development device 38 , a cleaning device 39 and a static eliminator 40 are arranged in the order of a first transferring process.
  • a first transferring roller 41 is arranged so as to form a first transferring part 42 between the photosensitive drum 36 and the intermediate transferring belt 31 .
  • four toner containers 43 each containing toner of different color (magenta, cyan, yellow and black) are provided so as to connect to the corresponding image forming parts 33 .
  • a second transferring roller 45 is arranged facing the intermediate transferring belt 31 to form a second transferring part 46 between the intermediate transferring belt 31 and the second transferring roller 45 .
  • a fixing device 47 is provided above the second transferring part 46 .
  • a sheet ejecting part 48 is provided above the fixing device 47 .
  • a sheet conveying path 49 is provided inside of the housing 3 so as to extend from the sheet feeding part 24 to the sheet ejecting part 48 through the second transferring part 46 and the fixing device 47 .
  • the exposure device 25 exposes the surface of the photosensitive drum 36 with a laser light to form an electrostatic latent image on the surface of the photosensitive drum 36 .
  • the electrostatic latent image is then developed into a toner image of corresponding color by the developing device 38 .
  • the toner image is first-transferred on the intermediate transferring belt 31 at the first transferring part 42 .
  • the above-mentioned operation is repeated in order by the image forming parts 33 , thereby forming a full color toner image onto the intermediate transferring belt 31 .
  • toner and residual electric charge remained on the photosensitive drum 36 are removed by the cleaning device 39 and the static eliminator 40 , respectively.
  • the sheet fed from the sheet feeding cassette 23 by the sheet feeding device 24 is conveyed to the second transferring part 46 in a suitable timing for the above-mentioned image forming operation. Then, in the second transferring part 46 , the full color toner image on the intermediate transferring belt 31 is second-transferred onto the sheet.
  • the sheet with the second-transferred toner image is conveyed to a downstream side along the sheet conveying path 49 to enter the fixing device 47 and then, the toner image is fixed on the sheet in the fixing device 47 .
  • the sheet with the fixed toner image is ejected from the sheet ejecting device 48 onto the ejected sheet tray 6 .
  • the toner remained on the intermediate transferring belt 31 is removed by the belt cleaning device 32 .
  • FIG. 7 is a view showing a unit-side rail viewed from a rear side
  • FIG. 8 is a perspective view showing a rail piece
  • FIGS. 9 and 10 are perspective views showing a movable rail
  • FIGS. 11 and 12 are perspective views showing the rail piece and the movable rail which are engaged each other
  • FIGS. 13A, 13B and 13C are plan views schematically showing a positional relationship between the rail piece and the movable rail during the image forming unit is drawn out.
  • a unit-side rail 50 is formed along a lower edge of each of the left and right supporting plates 30 of the image forming unit 27 .
  • the unit-side rail 50 has a rail piece 51 and a movable rail 52 .
  • the rail piece 51 is formed by bending a lower end portion of each of the left and right supporting plates 30 inward at a nearly right angle.
  • the movable rail 52 is engaged with the rail piece 51 .
  • the rail piece 51 includes a front half part 51 a of a narrower width and a rear half part 51 b of a wider width as shown in FIG. 8 . Between the front half part 51 a and the rear half part 51 b , a step part 51 c is formed. Further, along an inner edge of the rear half part 51 b , two of rectangular shaped cutaways 51 d are formed. On a lower face of the rail piece 51 , as shown in FIG. 7 , a plurality of semispherical projections 53 are formed at predetermined intervals.
  • the movable rail 52 has approximately the same length as the length of the rail piece 51 in the front and rear directions.
  • the movable rail 52 includes an engagement part 54 and an engagement piece 55 .
  • the engagement part 54 has a U-shaped sectional shape whose outer side face is opened.
  • the engagement piece 55 hangs downward from the engagement part 54 .
  • the engagement part 54 is formed by an upper plate 54 a , a lower plate 54 b and a vertical plate 54 c .
  • the upper plate 54 a and the lower plate 54 b are opposite to each other in the vertical direction.
  • the upper plate 54 a has a width narrower than the width of the rail piece 51 .
  • the lower plate 54 b has the same width as the width of the rail piece 51 .
  • the engagement piece 55 is formed by being bent downward at a nearly right angle from an outer edge of the lower plate 54 b of the engagement part 54 .
  • a locking piece 58 protruding downward is formed.
  • the length of the locking piece 58 is approximately 1 ⁇ 3 of the length of the engagement piece 55 .
  • the image forming unit 27 can slide with respect to the unit-side rails 50 from a state (storage state) in which the entire of the rail piece 51 engages with the movable rail 52 , as shown in FIG. 11 , to a state (first drawing step) in which nearly a front half of the rail piece 51 is drawn forward from the movable rail 52 , as shown in FIG. 12 .
  • FIG. 14 is a front view showing a state where the unit-side rail engages with the guide rail part.
  • the image forming unit 27 is supported by the unit storage space 10 by engaging the movable rail 52 of the unit-side rail 50 with the guide rail part 18 of the housing 3 .
  • the engagement part 54 of the movable rail 52 is supported on the top face 15 a of each cassette guides 15 , and the engagement piece 55 of the movable rail 52 is inserted in the gap 17 between each of the left and right side plates 3 c and 3 d of the housing 3 and each of the left and right cassette guides 15 . Since the engagement part 54 is prevented from being displaced upward by the holding piece 13 (see FIG.
  • the engagement part 54 can slide in a horizontal direction along the top face 15 a of the cassette guide 15 . Further, since the engagement piece 55 passes through the gap 17 between each of the left and right side plates 3 c and 3 d and each of the left and right cassette guides 15 , the image forming unit 27 is prevented from being displaced in the left and right directions so that the image forming unit 27 can stably slide in the front and rear directions on a horizontal plane.
  • FIG. 15A shows the image forming unit in the storage state
  • FIG. 15B shows the image forming unit drawn into the first drawing step
  • FIG. 15C shows the image forming unit drawn into the second drawing step
  • FIG. 16 is a perspective view showing the image forming unit drawn into the second drawing step.
  • the movable rail 52 engaged with the step part 51 c of the rail piece 51 is guided by the guide rail part 18 and is drawn forward together with the image forming unit 27 in the horizontal direction.
  • the engagement part 54 of the movable rail 52 slides along the top face 15 a of the cassette guide 15
  • the engagement piece 55 slides through the gap 17 between each of the left and right side plates 3 c and 3 d of the housing 3 and each cassette guide 15 .
  • the unit-side rail 50 provided in the image forming unit 27 is slid along the guide rail parts 18 formed between the left and right side plates 3 c and 3 d of the housing 3 and the cassette guides 15 . That is, by employing the housing 3 and the cassette guides 15 which have been conventionally provided to the apparatus main body 2 , the guide rail parts 18 are formed without employing using a new member. Accordingly, it is not necessary to provide a guide rail as a dedicated member to the apparatus main body 2 . This makes it is possible to reduce the size of the apparatus main body 2 , reduce the number of members and remove a working process of providing the guide rail to the apparatus main body 2 . Therefore, it is possible to make the image forming apparatus 1 small and reduce the cost of the image forming apparatus 1 . In addition, it is also possible to restrict the drawing of the unit-side rails 50 by employing the stay 8 which has been conventionally provided.
  • the unit-side rail 50 is formed by the rail piece 51 which is formed by bending the lower end portion of each of the left and right supporting plates 30 of the image forming unit 27 and the movable rail 52 which engages with the rail piece 51 , so that it is possible to draw the image forming unit 27 through the two steps of the first drawing step and the second drawing step. Accordingly, a drawing stroke of the image forming unit 27 can be made long and therefore the image forming unit 27 can be drawn stably. Further, since the rail pieces 51 are integrally formed with the left and right supporting plates 30 of the imaging unit 27 , it is not necessary to provide a rail as a dedicated member to the image forming unit 27 . Accordingly, it is possible to further reduce the number of members and the number of working processes.
  • the movable rails 52 are made of a metal material
  • the cassette guides 15 are made of a resin material
  • the movable rails 52 slide on top faces of a plurality of protruded parts 16 formed on the top faces 15 a of the cassette guides 15 , it is possible to reduce a contact area of the movable rails 52 and the top faces 15 a of the cassette guides. Accordingly, the movable rails 52 can be drawn smoothly.
  • the configuration of the disclosure was described in a case of applying the configuration of the present disclosure to the color printer 1 .
  • the configuration of the disclosure may be applied to another image forming apparatus, such as a copying machine, a facsimile or a multifunction peripheral, except for the printer 1 .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrophotography Configuration And Component (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
US15/177,647 2015-06-15 2016-06-09 Image forming apparatus Active 2036-07-06 US9791824B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-120325 2015-06-15
JP2015120325A JP6299680B2 (ja) 2015-06-15 2015-06-15 画像形成装置

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US20160363906A1 US20160363906A1 (en) 2016-12-15
US9791824B2 true US9791824B2 (en) 2017-10-17

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JP2022163913A (ja) 2021-04-15 2022-10-27 東芝テック株式会社 カセット引き込み装置

Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2004299214A (ja) 2003-03-31 2004-10-28 Canon Inc 画像処理装置
US8229319B2 (en) * 2009-04-28 2012-07-24 Brother Kogyo Kabushiki Kaisha Image forming apparatus including detachable supporting member
US8682212B2 (en) * 2009-03-26 2014-03-25 Canon Kabushiki Kaisha Electrophotographic image forming apparatus
US9367015B2 (en) * 2014-01-23 2016-06-14 Kyocera Document Solutions Inc. Sheet feeder and image forming apparatus

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Publication number Priority date Publication date Assignee Title
JPH02291351A (ja) * 1989-04-28 1990-12-03 Canon Inc 画像形成装置
JPH04138466A (ja) * 1990-09-29 1992-05-12 Konica Corp カラー画像形成装置
JP3092696B2 (ja) * 1996-04-25 2000-09-25 キヤノン株式会社 画像形成装置
JP3397992B2 (ja) * 1996-11-12 2003-04-21 京セラミタ株式会社 画像形成装置
JP4709133B2 (ja) * 2006-01-11 2011-06-22 キヤノン株式会社 電子写真画像形成装置
KR101520259B1 (ko) * 2011-12-15 2015-05-18 삼성전자 주식회사 화상형성장치
JP2015108743A (ja) * 2013-12-05 2015-06-11 キヤノン株式会社 画像形成装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004299214A (ja) 2003-03-31 2004-10-28 Canon Inc 画像処理装置
US8682212B2 (en) * 2009-03-26 2014-03-25 Canon Kabushiki Kaisha Electrophotographic image forming apparatus
US8229319B2 (en) * 2009-04-28 2012-07-24 Brother Kogyo Kabushiki Kaisha Image forming apparatus including detachable supporting member
US9367015B2 (en) * 2014-01-23 2016-06-14 Kyocera Document Solutions Inc. Sheet feeder and image forming apparatus

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US20160363906A1 (en) 2016-12-15
JP2017003907A (ja) 2017-01-05
JP6299680B2 (ja) 2018-03-28

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